Preparation method and application of graded-structure BiOI/Bi2MoO6 composite visible light catalyst

A hierarchical structure, visible light technology, applied in the field of environmental pollution control, can solve the problem of low electron/hole separation efficiency, achieve excellent visible light catalytic degradation activity, easy preparation process, and improved degradation efficiency

Inactive Publication Date: 2015-05-27
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

BiOI / Bi with hierarchical structure prepared by solvothermal-deposition 2 MoO 6 Composite visible light catalyst material to solve the problem of low electron / hole separation efficiency in the prior art although photocatalysts have a good visible light response range

Method used

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  • Preparation method and application of graded-structure BiOI/Bi2MoO6 composite visible light catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 Bi 2 MoO 6 Preparation of microspheres

[0021] Synthesis of Bi by solvothermal method 2 MoO 6 Microspheres, weighing 0.485 g Bi(NO 3 ) 3 ·5H 2 O was added to 10 mL of ethylene glycol solution, ultrasonically dispersed, and completely dissolved into a transparent solution; 60 mL of absolute ethanol was slowly added to the transparent solution, magnetically stirred, and 0.0618 g (NH 4 ) 6 Mo 7 o 24 4H 2 O, magnetic stirring to dissolve completely; move it to a 100 mL autoclave, and react at 140 °C for 16 h; after the autoclave gradually cools down to room temperature, centrifuge to precipitate, and wash with ethanol and deionized water for 3 The second time, the product was placed in an oven at 60 °C for 6 h.

Embodiment 2

[0022] Example 2 Bi 2 MoO 6 Preparation of microspheres

[0023] Synthesis of Bi by solvothermal method 2 MoO 6 Microspheres, weighing 0.97 g Bi(NO 3 ) 3 ·5H 2 O was added to 20 mL of ethylene glycol solution, ultrasonically dispersed to make it completely dissolved into a transparent solution; 50 mL of absolute ethanol was slowly added to the transparent solution, magnetically stirred, and 0.1236 g (NH 4 ) 6 Mo 7 o 24 4H 2 O, magnetic stirring to make it completely dissolved; move it to a 100 mL autoclave, and react at 160 °C for 12 h; after the autoclave gradually cooled to room temperature, centrifuge to precipitate, wash with ethanol and deionized water for 3 The second time, the product was placed in an oven at 70 °C for 5 h.

Embodiment 3

[0024] Example 3 Bi 2 MoO 6 Preparation of microspheres

[0025] Synthesis of Bi by solvothermal method 2 MoO 6Microspheres, weighing 1.455 g Bi(NO 3 ) 3 ·5H 2 O was added to 30 mL of ethylene glycol solution, ultrasonically dispersed, and completely dissolved into a transparent solution; 40 mL of absolute ethanol was slowly added to the transparent solution, magnetically stirred, and 0.1854 g (NH 4 ) 6 Mo 7 o 24 4H 2 O, magnetic stirring to dissolve completely; move it to a 100 mL autoclave, and react at 180 °C for 10 h; after the autoclave gradually cools down to room temperature, centrifuge to precipitate, and wash with ethanol and deionized water for 3 The second time, the product was placed in an oven at 80 °C for 4 h.

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Abstract

The invention discloses a preparation method of a graded-structure BiOI/Bi2MoO6 composite visible light catalyst and belongs to the technical field of environment pollution management. The preparation method is characterized by comprising the following steps: firstly, preparing Bi2MoO6 from Bi(NO3)3.5H2O and (NH4)6Mo7O24.4H2O through a solvent thermal method under the condition of a glycol/absolute ethyl alcohol mixed solvent; and by utilizing a chemical deposition method and taking Bi(NO3)3.5H2O as a bismuth source, KI as an iodine source and glycol/water as the mixed solvent, preparing the graded-structure BiOI/Bi2MoO6 composite visible light catalyst for visible light catalytic degradation of an endocrine disrupter bisphenol A and a dye pollutant methylene blue MB. The preparation method has the advantages of simplicity in operation, stable performance, high degradation efficiency, no other pollutants in a preparation process and the like, and has very high practical values and application prospects.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, in particular to a hierarchical structure BiOI / BiOI 2 MoO 6 Preparation method and application of composite visible light catalyst. Background technique [0002] Photocatalysis is one of the most active research fields at home and abroad in recent years, and its basic research, especially application development research, develops very rapidly. Traditional wide-bandgap photocatalysts such as titanium dioxide are widely favored by people because of their high photocatalytic activity, strong oxidation ability, good chemical stability, non-toxicity and no secondary pollution. However, there are inevitably some shortcomings, such as: nano-TiO 2 The photoresponse range is narrow, and its light absorption range is limited to the ultraviolet region; TiO 2 The recombination probability of photogenerated electron and hole pairs in the catalyst is relatively high, which greatly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/132C02F1/30C02F101/34C02F103/06
Inventor 闫涛王晓东魏琴杜斌刘红烨孙蒙闫良国
Owner UNIV OF JINAN
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